We had a Revolutionary War to get away from the oppressive British King, yet 18th Century Britain's laws were not even a fraction of a percentage point of what our laws are. Our government tells you what you can eat, what you can buy, and how much it's going to cost. These are huge intrusions into our daily lives that even the most power-hungry people in the 18th Century could never have even dreamed of. They are clearly violations of the Bill of Rights. But, who is going to stop them? The people in power certainly like this, because they get more power. The Supreme Court generally lets things go, because they got appointed by previous presidents to do that exact job.
If John Adams had proposed in 1790 that we allow the federal government to regulate sports at our universities people would have laughed at him. If he persisted, and people found out that he was serious, he would have been thrown out of politics and never been allowed near the ballot in 1796. The federal government is, specifically, ONLY ALLOWED to regulate trade between the states and between foreign nations and national security (e.g. war and peace with foreign nations). These services are to be paid through money given from each State to the Federal Goverment. You see, until the 20th Century, there was no such thing as a Federal Income Tax.
Just because you were born into a system doesn't mean that it's right. What part of the Bill of Rights do you not understand???
Amendment IX:
The enumeration in the Constitution, of certain rights, shall not be construed to deny or disparage others retained by the people.
Amendment X:
The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people.
In other words, since the federal government is not given the right to regulate sports at Universities in the Constitution, they are never allowed to do it. Also, it would impede upon the people's rights to their own property (i.e. the University's rights to spend its own money as it wishes).